If a committee of 3 people is to be selected from among 5 married couples so that the committee does not include two people who are married to each other, how many such committees are possible?
20
40
50
80
120
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从十个人里任意选三个人的集合用combination公式所以就是:10C3 = 120 但需要再减去有夫妻的组合,有5x8=40种可能 所以120-40=80
从十个人里任意选三个人的集合用combination公式所以就是:10C3 = 120
但需要再减去有夫妻的组合,有5x8=40种可能
所以120-40=80
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